Method and apparatus for indicating power allocation in multiuser superposition transmission

Abstract

Embodiments of the present disclosure provide a method and apparatus for indicating power allocation in multiuser superposition transmission. The method comprises: transmitting a signaling for indicating a first power parameter and a first power offset to a first UE so that the first UE determines first power allocation information specific to it based on the first power parameter and the first power offset; and transmitting a signaling for indicating a second power parameter and a second power offset to a second UE paired with the first UE so that the second UE determines second power allocation information specific to it based on the second power parameter and the second power offset. Embodiments of the present disclosure enable the near/victim UE of paired UEs to decode an interference signal caused by far/interfering UE based on power allocation information and remove the interference signal caused by far/interfering UE to improve correctness of decoding its own physical downlink shared channel data.

1 . A method for indicating power allocation in multiuser superposition transmission, comprising:
 transmitting a signaling for indicating a first power parameter and a first power offset to a first user equipment (UE) so that the first UE determines first power allocation information specific to it based on the first power parameter and the first power offset; and   transmitting a signaling for indicating a second power parameter and a second power offset to a second UE paired with the first UE so that the second UE determines second power allocation information specific to it based on the second power parameter and the second power offset.   
     
     
         2 . The method according to  claim 1 , wherein the first UE and the second UE are located in the same cell. 
     
     
         3 . The method according to  claim 2 , wherein transmitting a signaling for indicating the first power parameter and the first power offset to the first UE further comprises:
 transmitting a signaling for indicating the second power parameter and the second power offset to the first UE.   
     
     
         4 . The method according to  claim 2 , further comprising:
 transmitting a signaling for indicating Gray mapping operation to the first UE for multiuser superposition transmission based on Gray mapping.   
     
     
         5 . A method for indicating power allocation in multiuser superposition transmission, comprising:
 receiving a signaling for indicating a power parameter and a power offset; and   determining power allocation information specific to a UE based on the power parameter and the power offset.   
     
     
         6 . The method according to  claim 5 , wherein if the UE is a first UE, receiving the signaling indicating the power parameter and the power offset comprises:
 receiving a signaling for indicating a first power parameter and a first power offset; and   receiving a signaling for indicating a second power parameter and a second power offset associated with a second UE;   wherein the first UE and the second UE are located in the same cell.   
     
     
         7 . The method according to  claim 6 , wherein determining power allocation information specific to the UE based on the power parameter and the power offset comprises:
 determining first power allocation information specific to the first UE based on the first power parameter and the first power offset; and   determining second power allocation information specific to the second UE based on the second power parameter and the second power offset.   
     
     
         8 . The method according to  claim 7 , further comprising:
 decoding a signal of the second UE based on the second power allocation information; and   removing interference caused by the second UE based on the decoded signal of the second UE.   
     
     
         9 . The method according to  claim 5 , wherein if the UE is a first UE, the method further comprises:
 receiving a signaling for indicating Gray mapping operation; and   decoding the received signal based on the signaling for indicating Gray mapping operation.   
     
     
         10 . The method according to  claim 5 , wherein if the UE is a second UE,
 receiving the signaling for indicating the power parameter and the power offset comprises:
 receiving a second signaling for indicating a second power parameter and a second power offset; and 
   determining second power allocation information specific to the UE based on the power parameter and the power offset comprises:
 determining power allocation information specific to the second UE based on the second power parameter and the second power offset. 
   
     
     
         11 . An apparatus for indicating power allocation in multiuser superposition transmission, comprising:
 first transmitting unit configured to transmit a signaling for indicating a first power parameter and a first power offset to a first UE so that the first UE determines first power allocation information specific to it based on the first power parameter and the first power offset; and   second transmitting unit configured to transmit a signaling for indicating a second power parameter and a second power offset to a second UE paired with the first UE so that the second UE determines second power allocation information specific to it based on the second power parameter and the second power offset.   
     
     
         12 . The apparatus according to  claim 11 , wherein the first UE and the second UE are located in the same cell. 
     
     
         13 . The apparatus according to  claim 12 , wherein the first transmitting unit is further configured to:
 transmit a signaling for indicating the second power parameter and the second power offset to the first UE.   
     
     
         14 . (canceled) 
     
     
         15 . An apparatus for indicating power allocation in multiuser superposition transmission, comprising:
 first receiving unit configured to receive a signaling for indicating a power parameter and a power offset; and   determining unit configured to determine power allocation information specific to a UE based on the power parameter and the power offset.   
     
     
         16 . The apparatus according to  claim 15 , wherein if the UE is a first UE, the first receiving unit is configured to:
 receive a signaling for indicating a first power parameter and a first power offset; and   receive a signaling for indicating a second power parameter and a second power offset associated with a second UE;   wherein the first UE and the second UE are located in the same cell.   
     
     
         17 .- 20 . (canceled)